Probing the characteristic deformation behaviors of transformation-induced plasticity steels

Sheng Cheng; Xun Li Wang; Zhili Feng; Bjorn Clausen; Hahn Choo; Peter K. Liaw

doi:10.1007/s11661-008-9604-4

Probing the characteristic deformation behaviors of transformation-induced plasticity steels

Sheng Cheng, Xun Li Wang, Zhili Feng, Bjorn Clausen, Hahn Choo, Peter K. Liaw

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Abstract

The characteristic micromechanical behaviors of contrasting transformation-induced plasticity (TRIP) steels were investigated under tensile loading by in-situ neutron diffraction and transmission electron microscopy in detail. As demonstrated by the lattice strain development from the neutron diffraction, in the TRIP steel with ∼10 pct RA, microyielding of soft ferrite was responsible for the first stress partition, but a second stress sharing was caused by effective martensitic transformation. In the TRIP steel with less than 5 pct RA, where the contribution from the martensitic transformation was minor, stress partition took place virtually between the ferrite and bainite phase. Probing with systematic transmission electron microscopy (TEM) observations, we pin down the inherent correlation between the microstructural evolutions and the stress partition mechanism. Based on the experimental observations, the factors influencing the work-hardening behavior of TRIP steels are discussed.

Original language	English
Pages (from-to)	3105-3112
Number of pages	8
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	39
Issue number	13
DOIs	https://doi.org/10.1007/s11661-008-9604-4
State	Published - 2008

Funding

This work was supported by the NSF Major Research Instrumentation (MRI) Program (Grant No. DMR-0421219) and the NSF International Materials Institutes (IMI) program (Grant No. DMR-0231320). One of the authors (XLW) acknowledges support by the Division of Materials Sciences and Engineering, Office of Basic Energy Sciences, United States Department of Energy, under Contract No. DE-AC05-00OR22725 with UT–Battelle, LLC. This research was sponsored by the United States Department of Energy, Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Freedom CAR and Vehicle Technologies, as part of the Automotive Light Weighting Materials Program, under Contract No. DE-AC05-00OR22725 with UT–Battelle, LLC.

Funders	Funder number
NSF International Materials Institutes
Office of Freedom Car
National Science Foundation	DMR-0421219
U.S. Department of Energy	DE-AC05-00OR22725
Battelle
Office of Energy Efficiency and Renewable Energy
Basic Energy Sciences
Division of Materials Sciences and Engineering
Innovative Medicines Initiative	DMR-0231320

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10.1007/s11661-008-9604-4

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abstract = "The characteristic micromechanical behaviors of contrasting transformation-induced plasticity (TRIP) steels were investigated under tensile loading by in-situ neutron diffraction and transmission electron microscopy in detail. As demonstrated by the lattice strain development from the neutron diffraction, in the TRIP steel with ∼10 pct RA, microyielding of soft ferrite was responsible for the first stress partition, but a second stress sharing was caused by effective martensitic transformation. In the TRIP steel with less than 5 pct RA, where the contribution from the martensitic transformation was minor, stress partition took place virtually between the ferrite and bainite phase. Probing with systematic transmission electron microscopy (TEM) observations, we pin down the inherent correlation between the microstructural evolutions and the stress partition mechanism. Based on the experimental observations, the factors influencing the work-hardening behavior of TRIP steels are discussed.",

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AU - Cheng, Sheng

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AU - Feng, Zhili

AU - Clausen, Bjorn

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AU - Liaw, Peter K.

PY - 2008

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AB - The characteristic micromechanical behaviors of contrasting transformation-induced plasticity (TRIP) steels were investigated under tensile loading by in-situ neutron diffraction and transmission electron microscopy in detail. As demonstrated by the lattice strain development from the neutron diffraction, in the TRIP steel with ∼10 pct RA, microyielding of soft ferrite was responsible for the first stress partition, but a second stress sharing was caused by effective martensitic transformation. In the TRIP steel with less than 5 pct RA, where the contribution from the martensitic transformation was minor, stress partition took place virtually between the ferrite and bainite phase. Probing with systematic transmission electron microscopy (TEM) observations, we pin down the inherent correlation between the microstructural evolutions and the stress partition mechanism. Based on the experimental observations, the factors influencing the work-hardening behavior of TRIP steels are discussed.

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Probing the characteristic deformation behaviors of transformation-induced plasticity steels

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